I got a pair of Bassett Header in a trade and I am not sure what they fit. They are stamped with the part #8551 but when I check Basett's web site I cant find that part #. I was told by the guy who I traded with that the were for a Oldsmobile but everything else that came with the trade(bellhousing and motor mounts) are for a BBF. The bolt pattern on the headers also looks like BBF. I am going to sell the headers and would like to know what they fit before I list them. Thanks for the help.